Blender Game for Mobile Device
There was a project called BlenderPlayer for Android, which let you run .blend files and even develop games on an Android device:

https://www.blendernation.com/2012/06/26/blenderplayer-for-android/

But this has been discontinued. I'm not aware of any other way to export Blender games as mobile apps. 

You might also want to research this, but I'm sorry I don't know more detail about it https://www.youtube.com/watch?v=U8RzsJfh3Gc